n | a(n) |
---|---|
1 | 0 |
2 | 0 |
3 | 0 |
4 | 1 |
5 | 4 |
6 | 8 |
7 | 20 |
8 | 30 |
9 | 63 |
10 | 86 |
11 | 182 |
12 | 245 |
13 | 560 |
14 | 756 |
15 | 1784 |
16 | 2387 |
17 | 5600 |
18 | 7400 |
19 | 17336 |
20 | 22737 |
21 | 53850 |
22 | 70390 |
23 | 168610 |
24 | 219791 |
25 | 529529 |
26 | 688051 |
27 | 1662907 |
28 | 2154347 |
29 | 5225636 |
30 | 6754580 |
31 | 16451036 |
32 | 21225758 |
33 | 51878873 |
34 | 66826712 |
[0,0,0,1,4,8,20,30,63,86,182,245,560,756,1784, 2387,5600,7400,17336,22737,53850,70390,168610, 219791,529529,688051,1662907,2154347,5225636, 6754580,16451036,21225758,51878873,66826712] |